The next-gen MacBook Pro with Retina Display: SSD Analysis
Samsung OEM SSD for Mid 2012 and Early 2013 MacBook Pro Retina
Amazon.com: MCE Technologies 1TB Internal SSD Flash Upgrade for MacBook Pro Retina (Mid 2012 - Early 2013) - Includes USB 3.0 Enclosure for Original Drive & Install Kit! : Electronics
Amazon.com: Sintech M2(NGFF) SATA SSD Card,for Upgrade 24Pin 2012 Year MacBook PRO Retina SSD (Fit M.2 SATA 2280 SSD,Not Fit M.2 nVME SSD) : Electronics
MacBook Pro (Retina, 15-inch, Mid 2012) SSD Upgrade - A Leslie Wong Blog
Apple MacBook Pro (13-inch, Mid 2012) - i5 2.5 GHZ 6GB RAM 120GB SSD | eBay
MacBook Pro 13" Unibody Mid 2012 Hard Drive Replacement - iFixit Repair Guide
OWC SSD Kits For MacBook Pro Retina Display 2012 - 2013
Teardown of Mid-2012 MacBook Air Reveals Tweaked SSD Connector - MacRumors